I can assure that here today in the public hospital of Ca'n Misses in Ibiza,the Brits are being treated in their hordes for flu, sunburn, alcolholicism, been there helping to translate. It's the brits who go to the Artz 24hr doctors and private clinics who are getting charged, as do we if we use them!
On the other hand when my British daughter born in Spain took her EHIC with her to London and broke her hand, the hospital wanted to charge her £3,000, but she could produce a work contract so didn't have to pay, so it's not all black and white!!!